Typewriting machine



Mam im, 1942.

M. H.' MANN- TYFEWRlTING MACHINE Filed Dec. 27, '1940 7 sheetsQsneep 1 y 'Y .nm/Emmal MILS H.' MAN/v March w, 1942., M. H MANN TYPEWRITING MACHINE Filed Dec. 27, 1940 7 SheetS-Sheet 2 lNvENToR MIL/5.5. H. MANN .ATToRNEY 7 March 1o, 1942. M, H, MANNv 21,275,782

TYPEWRITING MAcrINE n Y A Filed Dec. 2v, 1940 7 sheets-sheet s Tif Z /z I March 10, 1942. M. H. MANN TYPEWRITING' MACHINE Filed Dec. 27,l 1940 '7 sheets-sheet 4 March 10, 1942. M H` MANN TYPEWRITI'NG MGHINE Filed Deo. 27, 1940 '7 Sheets-Seet LA QW lNvEN-roR MILES H. `MANN v BY ATTO RNEY

March l0; 1942.-` M, MANN,

TYPEWRITING MACHINE Filed Dec. 2.7, 1940 7 Sheets-Sheet 6v lNvE'N-roR M/LES HQ MANN En! y 't )a t ATTORNEY March 10, 1942. MANN 21,275,782

TYPEWRITING MACHINE Filed Dec. 27, 1940 '7 Sheets-Sheet 7 Y Patented Mar. 10, 1 942 2f lTYPEwmrrNc. MACHINE Miles H. Mann, West Hartford, Conn., -assignor..

to Underwood Elliott Fisher york, N: Y., a corporation of Company, New Delaware Application December 27, 1940, Serial No. 371,939

27 Claims.

This invention relates to typewriting `machines and'more particularly to machines usually referred to as fanfold or continuous billing machines, wherein carbon sheets are supported in interleaved relation between superposed continuous webs, or the plies of a fanfolded web, and are shiftable or retractable'therealong for registration with succeeding web portions or forms. Still more particularly, the invention relates to devices for retracting the carbon sheets by power mechanism. i

The invention may be applied to a machine embodying the broad principles of operation disclosed in the patent to Wernery and Smith No. 1,132,055, dated March 16, 1915. In the machine shown in that patent, av platen is supported in a frame that is displaceable above the general plane of a typewriter carriage to allow the carrbons to be retracted along the web plies with the latter in a straightened-out condition. Further more, apaper-gage is displaceable together with the platen from an out-of-way position to an effective position. While these details of constructionV are desirable, the invention is to be considered broadly as applicableto any billing (ci. 1st-126) ment of the carbons toward the platen.

Still another lobject is to incorporate in th'e ,power drive to the carbon carrier, devices to counterbalance the weight ofthe web hanging from the rear of the machine `so that the web and the carbons advance freely during line-spacing operations, without slipping on the platen.

Other objects and features of the invention will readily be apparent upon a consideration of l th'e detailed description which follows, as that description is read-in vthe lightofthe accom-l panying drawings.

In the accompanyingdrawings: Figure 1 isa general perspective view of .a

billing machine embodying the invention.

Figure 2 is a front perspective viw'showing the'platenl in a displaced'position yupon the carmachine wherein carborsheets are successively registered with succeeding portions of a continuous web.

It is a main object of thinve'ntion to provide for use with such machines a power driven -carboni-retracting device that is eiiicient and reliable in operation antiv adds a minimum of WeightA to the typewriter carriage. ,It is a further object of the invention to provide a simple electric motor-driven carbon-retract-ing device having a reliably effective 4control mechanism.

It is also an object of the invention tofpro-k vide a power-retracting device that is operatable by a motor on the frame, so that the weight of the ymotor does not impede the normalmove .A

ments of the carriage.

Another object of the invention is to provide a. power-driven retractor which is operative `in response to displacement of the platen to straighten the web, without special attention. by the operator.

Stl another object of the inventionis'to provide, in combination with a normally inactive power-driven carbon-retracting mechanism, a

paper-gage which is movable from an out-of-'way to an extended, effective position; and when "so extended, renders the power-retracting mechanism active.

Another object of the `invention is provide riage and also showing the manner in which an' extension carrying a carbon carrier is'attached to the carriage. e

Figure 3 is a sectional right-hand side view showingVv a displaceable platen sub-frame and a,v

latching device holding the sub-frame in normal position, the section being taken just rightwardly .of the middle` of the carriage.

Figure 4 is a sectional side view similar' to.

Figure v3 taken near the right carriage end and illustratesl a gage bar operable to releasev the latching device..

In Figure 5, the platen sub-frame vof Figure 4 is shown in a fully displaced position.

Figure diflers from Figure 4 in that thfe latching device has been-released by a small forward displacement ofthe gage bar.

Figure 7 is a sectional view similar to Figure 3` but showsl the platen supporting frame partly displaced and a trip pawl thereon starting to ,actuate a lever for initiating a' power-retraction ofthe carbon carrier.

*Figure 8 is aj fractional side view of the typewriter carriage and its extension, as viewed from the left side of the machine, including portions of the power-retracting mechanism for thev carbon carrier.` A webv is shown as being typedl upon .in an advanced position.

In Figure 9, th'e platen frame is almost fully displaced and a gear of the retractor mechanism shown engaged with a-I power-driven pinion or gear "to cause a power retraction of the carbon carrier.

and drive connections therefrom to drive the typewriter carriage and the Carbon carrier retractor mechanism. e

Figure isa plan view showingthe motor of Figure 14 and transmission parts to drive a flexible'shaft. e l

Figure 16 shows a plan viewof the rear -portion of the drive mechanism for retracting the carbon carrier, together with control mechanism therefor.

Figure 17 .is a rear perspective view of substantially the mechanism seen in Figure 16, in the same position.

.In Figure 18, the carbon carrier retracting mechanism is shown conditioned for operation by a power-driven gear.

In Figure 19, the rearward power movement of the carbon carrier is shown as having been automatically interrupted as an incident to the retraction of the carbon carrier against a stop.

Figure 20 is a perspective view of the mechanism seen in Figure 19'but showing the retractor mechanism in the process of ybeing disconnected from the power driven gear.y

Figure 21 is a diagarmmatic showingv of means to energize the motor for the duration of the carbon carrier retraction.

Referring now to Figure 1, a. carriage I0 is mounted to travel upon front and rear rails II, I2 of a stationary typewriter frame generally indicated by the numeral I3. A- spring motor I4 moves the carriage in letter-feed steps in response to each typing impression made by typebars l5. The illustrated carriage comprises a main frame I6, a case-shiftable frame |1 within the main carriage frame I6, and a pivotally displaceable sub-frame I8 carrying a writing support inthe form of a platen 2-|. The frame I1 is case-shiftably mounted within the main carriage frame I6, in a manner not shown, but as -is usual in ,Underwood billing machines, and

; plates 56 are also rigidly joined half way between lng-them, seeFigures 2l and 3. The displaceable frame |8 is normally locatedwithin the case shift frame I1 so that the platen 2| bears upon front and rear feed rolls 26 and` 21, respectively,

vsee Figures 3 and 4. At each end of the carframe 1 and has near each of its opposite end s a latch arm 3l secured to it. Each arm 3| has a hook formation 33 that normally overlies a pin 34 on, an end piece 24V of the subframe to hold the latter` down." The hook or latch arms 3| the forward motion of the latch` arms by en-V gagement with the bar 23. `The platen 2| is rotatable within the displaceable -sub-frame |8 by means of a spindle 31 extending through the end plates 24 of the sub-frame |8. The platen spindle 31 has at each end a gear 38 secured to it.

and adjacent to ,each gear '38 is another gear 4I secured to a stub shaft 42 which' is revolvably mounted upon the adJacent case-shift frame end plate 22. As seen in Figures l and 2,

there is provided upon each end of the carriage,4

another gear 43 meshing with one of each of the gears 38 and 4|. Each stub shaft 42 is revolvable by a knob 44; and since each gear 43 is in mesh with a gear 38 and a gear 4I, the platen 2| vis'revolvable by turning either `one of theA knobs 44.

Attached to the rear of the carriage I8 is a rectangular extension or shelf 45, formed of lightgage sheet metal and having weighty-reducing openings 46. This extension is formed with downwardly-turned flanges 41 along the periphery and also along said openings 46 to stillen it. At the forward end, the extension is slidably carried for small limited lateral movements upon a rod 48 extending intermediate two spaced brackets 5| reaching rearwardly from the typewriter carriage I8. The brackets 5I are secured to therear of the main carriage frame |6 in a manner, not shown, and the carriage extension 45, therefore, does not case-shift with the caseshift frame |1.' About half way rearward of the carriage I0, the extension 45 has secured to it a downwardly reaching bracket 52 carrying a plurality of laterally spaced rollers 53 adapted to run in a stationary channel bar 54, between vertically spaced guide faces thereof. The channel bar is secured to a framework 55 extending from the rear of the typewriter frame I3 and comprising two rearwardly extending triangular plates 56, rigidly joined in slightly converging relationship, at their rear ends, by a U-shaped plate 51 and secured at their front ends to the rear'portion of the typewriter frame I3. "The triangular the channel bar 54 and the typewriter frame I3 by a plate 58, and in order to prevent the machine from tipping rearwardly, there are one or more props 6| extending downwardly from the plate 58 for resting on the desk or table. Each prop may comprise of a broad foot portion 62 and a stud 63 rising upwardly and being threaded into va, boss provided in the plate 58. By turning the stud 63, the foot portion 62 may be adjust-ed to thetop of the desk and a winged nut 64 may then be tightened to lock the stud. The rod 48 at the back of the carriage tends through holes 69 providedin-theperipheral flanges of the 4carriage extension 45v and the movement of the latter upon the rod 48 is limited by collars 65 fastened upon the rod, one at each lateral side of'the extension, slightly spaced therefrom. A cushion washer 66 of rubber, or the like, is interposed betweeneach collar 65 and the extension 45. The' extension 45 is carried along by the carriage by means of two springs 61, each spring having one end secured to a collar 68 fastened upon the rod 48 and having another end secured to the carriage extension 45. The springs 61 extend in opposite directions from) the collar 68 and are designed to urge the extension to'asfsume a denite position with respect to the carriage while permitting the extension 45 to '-lag momentarily behind the carriage during each letter-feed movement of the carriage. The typewriter carriage l0, therefore, letter feeds substantially without interference bythe mass of' the extension 45and the parts 4carried `thereby, and thus permits utmost typing speed. The collars 55 f orceably compel the carriage extension to move with the carriage during long carriage advance and long carriage return movements. V At the termination of such long movements, the springs 61 cushionthe arrest ofthe extension.'

The extension 45, when detached from the machine, can easily be twisted; but, when assembled in the machine, the ro1lers53 riding in the channel bar brace it and render it substantially rm, there being always at least two of the rollers 53 confined between the guide-faces of the bar 54. The extension 45 being somewhat flexible, it is not necessary' to align the channel bar 54 accurately with the rails and I2 of the typeguide bar 11 supported at its ends by means of brackets 18 branching outwardly from the -rear end of the carriage extension 45, and extends forwardly over the carriage extension 45, and down# wardly around to the front of the platen 2|. The case shift frame |1 supports a usual paper apron 82 and the displaceable sub-frame I8 has a paper ytable 84 extending tangentially from the upper front portion'of the platen 2|, as seen inFigures land 3. A form severing knife A85 is also carried by the sub-frame |8, see Figures 8-10, inclusive. The work web 83 consists of several plies 88 and the carbon sheets 8| extend for-` wardly from their supporting blades 16 in interleaved relation with the plies, the leading ends of the carbon sheets being normally about 1/2 inch' short of the leading ends of the work plies. Figure 8, as is indicated by the type bar! I striking the paper, shows thework web being typed uponf the leading end of the work web being shown as thereupon to actuate a. line-space mechanism slide '15. The rack 57 is geared toa power rotatable pinion 56,- which, when power rotated, advances said rack 57 in carriage return direction,

first to actuate said line-space slide and 'therefr after to returnthe carriage. In Figure 14 of the present application, the lrack and the pinion y engagedfroma clutch member 94 that may be` continuous1ydriven by a motor 95 through intermediate transmission members that may comprise a belt drive 96, a `shaft 91 and a worm latches 3| clear of the pins 34v and thereafter.vk

having been line spaced above the cutting edge of the knife 85.,v The carbon carrier 1| is shown advanced forwardly of a stop 88', toward kthe platen, and it will be evident from the descrip,-

Vtion ilollowing hereinafter that'this advance has, lbeenA brought about partly by lowering thedisplaceable sub-frame I8 and partly by advancing gear drive. 98, see Figure 14. Toeffect a linesp'acing land a carriage.returning operation, it

is merely necessary thatthe pinion 92 be' shifted to engage its teeth 93 with the clutch member 94. This, as evident from said above-mentioned Pitman patent, may occur responsive to depressinga'carriage return key, or responsive to the carriage reaching a definite position in its advance.-

The carbon sheets are shifted fr om time to time'to register with the su-cceedingforms tobe typed upon. This isfpreferably done with the-l web in a straightened position so that the web plies will not bind the carbons. Accordingly, whenever itis desired to shift the carbons 8| to register with a set of succeeding forms, thel sub-frame I8 is rst unlocked by moving the swung upwardly and forwardly to raise the platen 2| above the general plane of the carriage extension 45. See Figures 2, 9, and l0. According tothe embodiment of the invention shown, means are provided to do this by a single seen in Figures l and 2, the rgage bar |0| is` fastened midways between the ends of the carriage to a pivoted shaft |03 extending to one end of the sub-frame I8, whereat the shaft |03 carries xedly an arm |04. Bracketsl05 secured to the back of the bar 25` provide pivotalA supports for the shaft |03, and a torsion spring |06 urges the gage-carrying bar |0|, to normally occupy. a position against an abutment screw |01 carried by, a small bracket |08 upon the back side of the bar 25. As seen in Figure 4, the

arm ||l4extendsnormallyV rearwardly "from the shaft |03 and carries a pawl lmember |||.v This member is engageable with a pin ||0 on one of the latch arms 3| to swing the latter, together with the other latch arm 3|, rearwardly when the gage bar|0| is given an initial forward motion. During continued forward motion the gage, bar 0| lifts'the sub-frame I8 by engaging theV bar 25 thereon, so that finally the subframe'comes to rest against a pad ||2 upon the forward part of the main carriage-frame I6. The gagebar I0| andthe sub-frame |8 will then substantially be in the position illustrated in Figures 5 and 10, it being noted that the gage bar may reassume its normal position with re*- spect *to the displaceable frame I8, sometime during the displacement ofthe latter. 'I he dis- -tance from the edgeof the knife 85.50 thev gage |02 is equal to the length of the forms used sub-frame |8.

' taining the' belt ||6.

'and the disc |3|, ringgear |23 and rivets |22 secure the cup, the disc and the ring gear toand, to bring the carbons into register with succeeding forms, the carbons are retracted relative to the web a distance equal to a single form length. This is accomplished by advancing Vthe work web 83 against said paper gage |02 and shifting the carbon carrier unit 1| against the stop 88. The work web 83 is preferably advanced against said gage |02 incidental to moving the gage bar forwardly to raise the Todo this, the operator lightly pinches the leading end of the web plies 86 and the gage bar between the thumb and index fingers and swings the gage bar |3I-.while also sliding the fingers therealong to advance the leading ends of the plies tothe gage |02. The gage bar |0| is preferablymade of angular stock so as not to unduly bend or flex while displacing the frame. Furthermore, the bar being of angular stock provides a guide channell wherealong the fingers glide in a straight line.

Power retraction of carbon c'arrier 12 of the carbon carrier unit 1| has secured to the underside a bracket whereto a belt IIE, or its equivalent, is anchored by means of a clamp ||1. The belt ||6 extends rearwardly from the clamp ||1 onto a winding drum ||8 and may also extend forwardly onto another winding drum |2|. The rear winding drum ||8 consists of a shallow cup |28 and a round flat disc |3I, below `the cup forming a brim for re- Underneath the cup |28 gether. The ring gear has an internal raceway |24 constituting part of a ball bearing havingalso the top, to keep the beltv extending tothe car.

rier 1| in taut condition. therefore, offers substantially no resistance to the advance of the carbon carrier 1| toward the platen 2|. VThe drum 2| upon the front end of the carriage extension 45 consists also of a shallow cup and aspiral spring |33 housed within |32 of the rear drum ||8 and constantly tends to pull the belt I6 todraw the carbon'carrier unit 1| forwardly. The tension of the springs |32, |33 are so proportioned and adjusted relative to each other that the weight of the web 83,

trailing from the rear end of the machine, is'

counterbalanced and so that the friction opposing the forward movement'of the carbon arrier unit is almost overcome. The web 83 can therefore be moved forwardly with almost no opposition so that it is notliable to slip upon the platen during line spacing operations. The cup or drum |2|. as seen iniFivgure 12, is mounted This light spring,

, the cup is slightly stronger than the spiral spring to revolve by means of a ball bearing |34 upon a -stud |35 that is secured by a nut |36 to the'underside of a bracket plate |31 screwed upon the carriage extension. 45. The cup or drum |2| has aseries of integral ears |38 bent upwardly from its bottom to confine the spring |33. One. end of the spring |33 is anchored to the stud |35 and the other is hooked onto ,one of the ears |38. The tension of the spring |33 can be changed conveniently to counterbalance webs and carbon carriers of different weights,'by securing the stud |35 in different rotative positions upon the bracket |31. In order that the carbon carrier unit 1| may travel to the extreme front of the carriageextensicn 45, the belt may extend over a guide pulley |4|.

ly from said short shaft |43, to the rear ofthe typewriter frame where it ends in a horizontal shaft appendage |46 having a .spiral gear |41 secured upon it. The spiral gear |41 meshes with a worm |48 rotative with the motor driven shaft 91.

In the preferred embodiment of the invention, the electric motorv 95 runs continuously and, therefore, also the shaft 91, the worm |48, the spiral gear |41, the flexible shaft |44 and the pinion |42. The short shaft |46 carrying the spiral gear |41, see Figures 14 and 15, is revolvably supported in brackets |5| and |52 attached to a bracket support |53 that is secured to the rear of the stationary typewriter framework |3, and the end of the flexible casing |45 adjacent the shortshaft |46 is clamped by a screw at |54, to a branch |55 of the bracket |52. A cover |58 secured to the bracket |52 encloses, together with the latter, the spiral gear |41 and worm |48. The vertical shaft |43 carrying the pinion |42 lrotates at its upper end in a horizontal plate |51 fastened -to the underside of the carriagev extension 45 by studs |58, |6|, |62. Near the lower end, theshort shaft |43 rotates in a bushing |63 carried by a brackety |64 depending from and riveted to said plate |51. The pinion |42' is secured to the shaft |43 and is vertically confined between the bushing |53 and the plate |51. Just below` the vertical shaft |43 the flexible shaft casing |45 extends into a verticalcollar |65 and is clamped thereto by a screw |66.` The collar |65 is suspended from the bushing. |63 as at |51 in roller bearing fashion and is free to `turn thereon. Consequently, the rear end `of the casing 45 is free to turn duringthe movement of the carriage I0, so that all drag which would otherwise result from the twisting of the casingv ing arm |21 against the tension of a spring |13 in its normal position seen in Figures 16 and.17.

As seen in Figures ll, 12,'14, 16 and |7, the position of the arm The member I1| is pivoted at |14 to a forwardly extending part of the bracket plate v|51 and has a branch ending in an -upwardly extending ear which, as shown in Figure 11, normally engages the plate |51 under the combined tension of. the springs |13 and-|91. The link |12 has a saddle |18 formed by a fork against which a pin |11 on the drum carrying arm |21 normally bears and, as seen in Figure 16, the pin |11 and to be locked `against rearward movement, see Fig-I ure 1,7.

The member |1| is -movable about its pivot |14 to the position seen in Figure 18, in order to release the drum carrying arm |21 for rearward movement' by the spring |13 to engage the ring gear |23 with the motor-driven pinion |42. Consequently, the drum I|8 will .be rotated and the carbon carrier I| drawn rearwardly by the belt IIS. According to the preferred form of applicants'invention, as pointed out previously, the carbon carrierfllvis retracted incidental to elevating the platen carrying sub-frame I8 to the Figure 5 position. To this end the member |1| is operatable through a train of mechanism actuable by a trip pawl |18 provided on an adjustably fixed arm I8| on the platen carrying subframe I8. Said pawl |18 comes into contact with a pin |82 on a lever |83 during the elevation of the sub-frame I8, whenY the latter approaches its fully elevated position, see Figure 7.

Full movement of the sub-frame I8 to the ele-f' vated position seen in'Figure 5 causes the lever |83 to be actuated. The movement given to the and from there over a rightwardly extending link |88 to another bell crank |81 connected by' The bell crank a link |88 to the member |1I. |81 is pivoted upon a `support |9| that is xedly carried by the rod 48 by means of the collar 68 and another collar |92. 'Ihe connecting link |88 extends rearwardly from the point where itis linked to the bell crankv|81 in parallelism with the, carriage extension and therefore swings idly about said point whenever the carriage extension moves upon the rod 48 relatively to the carriage I 0. In other words, the connecting link. |98 in `no way impedes the movement of the extension or shelf 45 on` the carriage. The pawl |18 actuates said train only momentarily, `as it is desired that the member |1| be restorable' immediately after actuation independently of restoring the platen sub-frame I8. The pawl |18 for this purpose is arranged to glide off the pin |82 just prior to completing the displacement of the sub-frame I8. This is viewed in Figure 5. The arm I8| fulcrums about one of the pivot studs 28 of the sub-frame I8, but the position in which the arm travels with the sub-frame |8 depends on the position in which .it is clamped thereto by a screw. |93, best seen in Figure 2. The pawl |18 is pivotally carried by the arm I8| to by-pass the pin |82 on lever |83 when the subframe |8 is restored to normal position. In actuating'the lever |83, a thin ntail extending from lever is transmitted byy a rearwardly extending l .link |84 to a bell crank |85 on the bracket 5|',

swinging under the pin ||2 under .the influence the pawl |18 reacts against a boss upon which the stud 28 is secured to the shift frame |1.

The drum I I8 revolves after ,the ring gear |23` has swung into mesh with the pinion orgear |42 and draws the belt I6 rearwardly by winding it. Consequently, also the carbon carrier 1| is drawnv rearwardly. While this occurs, theoperator holds the leading end of the-web stationary, as seenv in Figure 10. When subsequently, due

'to the resulting retraction of the carbon carrierk 1|, the leading ends of the carbons 8| 'reach a position `rearwardly of the knife 85, the carbon carrier 1| engages the stop 88.l The stop 88 is adjustable along a serrated bar 94 extending along the rfull depth ofthe carriage extension 45. For a purpose to be later described, the bar |94 maybe mounted for a limited. rearward displacement, by providing the ends thereof with 7 slots |95 and passing mounting screws |95 therethrough into the extension. 45. The rearwardly movable carbon carrier 1| is therefore eventually arrested by the stop 88, 'and the momentarily still-power-driven drum H8 thereafter, instead of drawing the carbon carrier 1| rearwardly,

draws the arm or support |21 forwardly against the tension` of the spring |13 tolseparate the gears |23, |42. The momentum of the drum I|8 and the gear |23 is sufficient to cause the arm |21 to be drawn forwardly by the belt until', as 'l illustrated in Figure 19, the gear A|23 is fully separated from the driver lpinion |42, that is, until the drive to the drum is fully open. The

. pivoted latching member |1| and the yshort link f |12 carried thereby concomitantly move under the tension of a spring |91 to lock the arm |21 .in the forwardly movedv position seen in Figure 19. It might, therefore, be said that displacement of the gage |02 and sub-frame I8 causes? `the power retracting means to be effective pending retractlonyof the carrier'to a definite position, the denite position'being established -by the sto'p 88.

It shouid be noted that asthe member m and the link.|12 move fromtheir Figure 18positions to their Figure 19` positions, the spring v|91 becomes effective to favor movement of the arm |21 forwardly. "I'he power that the vspring |91 isinally able to exert upon the arm |21 is greater than that of spring |13. After the power dis-4 placement of the carbon carrier has been completedfthe operator may proceed to lower the sub-frame VI8 to normal position, the operator still pinching the leading end of the'web ,83 against the paper gage bar 0|. During this procedure the trip pawl |18 passes idly over the pin |82 and the latch arms 3| Areengage the pins 34 on the sub-frame I8. Furthermore, also the pawl member I|| assumes normal position by ing against an off-set portion"2|l3 of thedrum-l carrying arm |21, as seen in Figure 16. 'A hook 204 formed ona` bracket member 2051s fastened to thestop bar |94 and transmits thev tension of a spring 208 to urge the latch 20| counterclockwise as viewed from the top of the machine.

When, therefore, responsive to the displacement of the sub-frame |8, the arm |21 is moved rearwardly to engage the gear |23 with the pinion |42, the latch 20| moves into position to hold by its ear 202 the arm |21 against forward displacement. This assures positive engagement ofY the gear |23 and the pinion |42 pending full retraction of the carbon carrier 1| resulting in a element. |1 I, following its operation, in operated position. This is desirable to give the arm |21 ample .opportunity to swing rearwardly to engage the gear |23 with the pinion |42, it being remembered that as far as the trip pawl |18 is concerned, the member |1| is free to return to normal position after the sub-frame is comi pletely displaced. The latch arm 2|| is under constant tension of a spring 2|2 and the member |1| is free to move from the Figure 18 position y to the Figure 19 position when the carbon carrier, in its rearward movement, has displaced the gage bar |24. Themember I1 vis freed from the latch 2|| through a shoulder 2|3 on the bracket member 205 which moves. the latch arm 2|| free of the ear |15.

The motor 95, instead of running continuously, may normally be deenergized. This has been diagrammatically illustrated in the modification shown in Figure 2l. In said figure, it can be seen that the motor circuit 2 |4 may be closed and opened respectively by rearward and forward movements of the drum-carrying arm |21r through the provision of contact fingers 2 l5, l2|6.

A motor switch 2|8 may also bevpovided to energize the motor for carriage-return operations. if r,the motris to run intermittently for carbon retracting operations and `carriage-return operations. The control device'for the said switch 2 I8 may be the same as illustrated in the said patent to Pitman, that is, the switch 2|3 may be closed under the control of the carriage-return key o1 This switch is, of course, only necessary .l

a retractor drive on said carriage, and means to transmit motion from said motor to said retractor drive in any position of said` carriage; and means on -the carriage operatable to render said i power retracting means eifective pending re- ,i

traction of said carrier to a definite position.

3. In a writing machine having a platen supporting carriage movable on-a frame in letter-v feed and return rdirections to different positions, and a carbon carrier on the` carriage movable toward and retractable from said platen;'nor mally ineiectively conditioned power retracting means for said carbon carrier, including, a stationarily located motor, a retractor drive on said carriage, and flexible lshaft means to transmit motion from `said motor to said retractor drive in any position of said carriage; and means operatable to condition said power retracting means to retract said carrier.

4. In a writing machine having a carboncarrier adapted to be advanced toward and retracted from a writing support, stop means'engageable'by said carrier in being retracted, power means, retractor means for said carrier normally uniniiuencedby said power means, but adapted to be influenced thereby to retract said carrier from said support, and means operatable to cause said retractor means vto be. influenced by said power means to retract said carrier, said last means including provision to render said retractor means uninfluenced by said power means responsive to retraction of said carrier against said stop means.

5. In a writing machineI having a platen sup-` porting carriage movable on a frame; a carbon carrier onsaid carriage adapted 'to be advanced toward and retracted from said platen; continually operating power means, aibelt drive, on'said carriage, including a belt connected vto the carbon themovement of the carriage to line-end position, and may be opened automatically upon arrival ofthe carriage in a definite return position.

What is claimed is: 1. In a writing machine having a platen supporting carriage movable on a frame in letterfeed and return directions todifferent positions,v

and a carbon'` carrier on the carriage movable toward and retractable from said platen; normally ineiTective-power retracting means for said carbon carrier, including, a motor on the frame, a retractor drive on said carriage, and means to transmit motion from said lmotor to said retractor drive in any position of said carriage; and means operatable torender said power retracting means effective pending retraction of said carrier to a definite position.

2. In'a writing machine having a platen supporting carriagemovable on a frame in letter- 'feed and return directions to different positions,

and a` carboncarrier on the carriage movable toward and retractable from said'platen; normally ineffective power retracting means for said carbon carrier, including, 4i?. motor on *the frame,

cel

carrier and a drum normally disconnected from said power means but operatable thereby to drive said belt to retract said carbon carrier, and means operatable to connect said drum with said power means pending retracting o f the carrier to a definite position. y

6.*In a writing machine having a platen sup-- porting carriage movable on a frame, and having `a carbon carrier on the carriage movable toward and retractable from the platen, normally ineffectuate power retracting means for said carrier, a limitedly movable element extending parallelly along the moving path of said carrier, a stop adjustable along said movable element and engageable .by said carrier in beingretracted, to displace said movable element, and means conditionable to effectuate and ineffectuate said power retracting means, being conditionable to ineifectuate said power retracting means responsive to displacement' of said movable element by said carrier.

7. In a writing'machine having a carbon carrier adapted to be advanced toward and retracted from a writing support, a belt drive associated with said carrier and adapted to be driven to retract the latter, means normally urging said belt drive to advance saidcarrier, normally ineffective power means adapted to drive said belt drive to retract said carrier, and means to render said power means effective pending retraction of the carrier to a deiinite position. 8. In a writing machine having a carbon carrier advanceable toward and retractable from a writing support; drive means operable to retract spring associated-with said drum to keep said belt taut, said spring oiering substantially' no resistance to the advance of said carrier, normally ineffective power means adapted to turn said drumto cause it to retract said carrier, and means conditionable at will to render said4 power means effective to turn said drum ,to thereby wind said belt and retract said carbon` carrier.

1 9. In a writing'machine having a carbon car- *rier advanceabletoward and retractable from a writing support; drive means operable to retract said carrier, said drive means including a belt attached to said carrier and a drum adapted by winding the beltfto retract said carrier, a spring associated with said drum tending to wind said belt and retract said carrier in order to keep said belt taut, spring means associated with said carrier to at least counterbalance the tendency of said spring to retract said `carrier, normally `ineffective power means adapted to turn said drum A to cause said belt to retract said carrier, and means conditionable at will to render said power means effective to retract said carrier.

10. In a writing machine having a carbon carrier adapted to be advanced toward and retracted from a writing support, a belt drive for said carrier, comprising, two drums, one spaced from the other in the direction in which the carrier is advanceable and retractable, a belt extending intermediate said drums, said drums having each an opposite end of said belt attached and wound thereupon, means operatively connecting said belt intermediate s aid drums to said carrier, a spring associated with each one of said drums to keep the belt taut intermediate said drums, said springs being relatively proportioned so that the carrier has a tendency to advance toward the writing support, normally ineiective power means adapted to drive said belt drive to retract said carrier, and means to render said power means eiective pending retraction of said carrier to a denite position. Y

l1. In a writing machine having a writing support and a carbon carrier movable toward and retractable from'the writing support; a motor; a

beltdrive for retracting said carrier, including, a

belt operatively connectedwith said carrier and a drive drum for said belt rotatable in one direction-to retract said carrier; means forrotating said drum in the said one direction by said motor, including a drive connection adapted to be opened and closed; a member movable to open and close said connection; means inuencing said member to close said connection; means for holding said member responsive to being moved to open said connection; means operatablefor causing said drum to be driven by said motor to retract said carrier; including means operatable` to effect a release of said member by said holding means for causing closure of said connection; and means engageable by said carrier in being retracted to cause said member to be moved to open said drive connection.

12. In a writing machine having a writing support and a carbon carrier movable toward and retractable from the writing support; a belt drive for retracting said carrier, including a belt operatively associated with said carrier and a drive drum for said belt rotatable in one direction' to retract said c arrier; power means `for driving said drum in the said direction, including a drive,

Y connection adapted to be opened and closed; means including a member movable to close and open said connection; a springI inuencing said last means to close said connection; means for to eiect a release of said member by said holding means for` causing closure of .said connection unel der the inuence of said spring; and means engageable by said carrier in being retracted to cause said member to be moved to open said drive connection. t

V13. In a v `iting machine having a writing support and a carbon carrier movable toward and retractable fromthe writing support; stop means against which said carrier is retractable; a belt drive for retracting said carrier, including a belt operatively connected with said carrier, and-a drive drum for said lbelt rotatable in one direction to retractsaid carrier; a gear on said drum; power means; a gear adapted to be driven by said power means to rotate said first Ygear for retracting said carrier; a support for. said drum and said rst gear movable to engage or disengage said gears; means inuencing said support to engage said gears; means for holding said support responsive to being moved to disengage `said gears,V and means operatable for causing said first gear to be driven vto vretract saidcarrier; including means operatable to effect a release of said support by-said holding means to cause said gears to engage; said inuencing means being of such strength and said second gear and said support being so arranged that said support is movable to separate said gears by momentarily continued rotation of Asaid drum subsequent to power retraction of said carrier against said stop means.

14. In a writing machine having a writing support and a carbon carrier movable towardvan'd retractable from the writing support; stop means said gears, a spring, means'operated by saide spring to hold said'support responsive to being moved to disengage said gearsand means operatable for causing saidfirst gear to be driven by the power drive gear to retract said carrier, including means operatable to release said support from said holding means for engagement of said gears, said influencing means being of such 'strength and said second gear and said support being so arranged that said support is movable to separate said gears by momentarily continued rotation of said drum, subsequent to power retraction of said carrier againsty said stop means,

and said spring operated means being designed rto favor movement of said support to separate said gears after an initialmovement `of said support to separate said gears. 15. In a writing machine having a writing support and a carbon carrier movable toward and retractable from the writing support; a belt drive for retracting said carrier, including, Va belt operatively connected to said carrier, and a drive drum for said belt rotatable ink one direction to retract said carrier; a gear on said drum; power l means; a second gear adapted to be driven'by` saidpower means to rotate said rst gear for retracting said carrier; a support for said drum and said rst gear movable to and from a normal position to respectively disengage and engage said gears; latch means automatically effective to hold said support when moved to engage said gears; manually operatable means for causing said support to move to engage said gears; and

Imeans limitedlyy movable by the retraction of said carrier to a definite position to -release said latch means and stop said carrier; said second gear and said support being so arranged that said support is movable to separate said gears by a momentarily'continued rotation of said drum subsequent to the release of said latch means by said limitedly movable means.

16. In a writing machine having a platen supporting carriage movable on a frame in letterfeed and return directions to different positions, and a carbon carrier on the carriage movable toward said platen; normally ineffective power retracting means for said carrier, including, a stationarily located motor, and means to trans.- mit motion from said motor to said carrier in any position of said carriage; and means oper.

atable to render said power retractingmeans effective pending retraction of said carrier to definite position. .i

17. In a writing machine having a carriage movable on a frame in letter-feed and return directions to different positions, a platen displaceable on said carriage, and a carbon carrierv on said carriage movable toward the platen; normally ineffective power retracting means for said carrier, including a stationarily located electric motor, a retractordrive on the carriage, and means to transmit motion from said motor to said retractor drive in any position of the carriage; and means operative upon displacement of the platen to render said retracting means effective, and operative upon retractionr of the car'- rier to `a certain position to render said retracting means automatically ineffective.

18. vIn a writing machine having a carriage movable on a frame in letter-feed and'return directions, a platen displaceable on said carriage, and a carbon carriervon said carriage movable toward the platen; an electric motor on the frame; normally ineffective motor-operatable means adapted to retract said carrier 'in'any position of the carriage; and means loperative upon displacement of said platen from writing position, to render said motor operatable means effective and automatically operative upon retraction of thecarrier to a certain position to operatable means adapted to retract said carrier in any position of the carriage', including a. normally open clutch; and means to close and open said clutch, including means operative upon retraction of the carrier to a certain position, to open said clutch.

21. In a writing machine having a carriage movable on a frame in letter-feed and return directions to different positions, a platen on said carriage, and a carbon carrier on said carriage movable toward the platen; a stationarily located electric motor; normally ineffective motoroperatable means adapted to retract said carrier in any position of the carriage, including a nor` mally open drive connection, and means to open -and close said drive connection, including, means engageable by said c arrier in being retracted, and means responding to the engagementI of said engageable means by said carrier, to open said drive connection.

22. In a writing machine having a carriage movable on a frame in letter-feed and return directions, a platen displaceable on said carriage and a carbon carrier on said carriage movable toward the platen; an electric mot'or on the frame, normally ineffective motor-operatable means adapted to retract said carrier in any position of the carriage, including a normally open clutch; means, operative upon displacement of said platen, to engage said clutch, to render said motor-operatable means effective; and means, operative upon retraction of the carrier to a certain position, tocause clutch disengagement.

23. In a writing machine having a carriage movable on a frame in letter-feed and return directions to different positions, a platen on said carriage, and a carbon carrier on said carriage movable toward the platen; a normally deener" gized carriage return motor on the frame; means -operatable by saidv motor to retract said carrier in any position of the carriage, including a nor-A mally open drive connection; and means to close render said motor operatable means ineffective Q y said motor-operatable means ineffective to exert driving influence upon the carrier responsive to the retraction of the carrier to a certain position.

20. In a writing machine having a carriage movable on a frame in letter-feed and return directions to different positions.- a platen on said carriage, and a carbon carrier on said carriage movable toward the platen; a stationarily located electric motor; normally ineffective motorsaid driveconnection and energize said motor,

including a provision to deenergize the motor.

and open said drive connection automatically responsiveto the retractionof said carrier to a A certain position.

24. In a writing machine having a carriage movable on a frame in letter-feed and return directions, andy a platen on said carriage, relative to which carbon sheets on ,the carriage are advanceable. and retractable; normally ineffective power retracting means for said carbons, including a stationarily located electric motor, and means operatable by said motor to retract said carbons in any position of the carriage; and means to render said power retracting means effective;

25. In'a writing machine having a carriage movable on a frame in letter-feed and retiirn vdirections, a platen on said carriage, and a carbonlcarrier on said carriage movable toward the platen; an electric motor on the frame; normally ineffective motor-operatable means adapted to retract said carrier in any position of the car.

riage; control means; and means, conditionable i by said control means to render said motor-opertractable to -a certain position;` motor-drive eemvee means to retract said carbon sheets, including e drive connection adepte-:l to be elosed end opened respectively te render seid motor-drive means effective or irieeotive; en operable eontrol; and

means adapted, by the operation of seid control,

to render seid drive eormection dosed, and adapted, incidental to the restoration of the cartoon sheets to the said position, to render seid driv'e connection automatically opem said. lest means including e provision wlgereby the drive sonnen tion is rendered open irrespective of when the control is restored after operationg 27 En e. writing machine having e displaceeble platen relatively to whiela eert-son sheets are means to retract seid carton sheets, lncluding e drive conneetion adapted to be closed or openedV respectively to render the motorwdtive means effeetive or ineective; and means adapted, incldental to the displacement of the pieten, to renden' seid drive connection c1osed,end adapted, incidental to the retraction of the carbon `sheets to the said position, to render said drive connectime open, seid last means including e provision whereby the drive connection is rendered open irrespective'of when 'the platen is restored after displacement. Y v

retractable to e. certain position; rxfxotor-drive v 

